Improvement in bobbin-winders for sewing-machines



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ETHOMAS SHANKS, 0F BALTIMORE, MARYLAND.

Leners Patent No. 99,011, dated January 1s', y1870.

The Schedule referred to :in'these Letters yPatent and making part of the samer To all whom 'it may concern:

Be it known that I, THOMAS SHANKs, of the city and county of Baltimore, and State of Maryland, have invented anew and improved Self-Acting Thread- Guide for Bobbin-W'inder for Sewing-Machines; and I do hereby declare that the following isa full, clear, and exact description of the constrution and operation of the same, reference being hxd to the accompanying drawings, making a part of this specification, in whichv Figure 1 is a side elevation looking toward the compound lver, and

Figure 2, a plan view.

This invention consists of a mechanism to be attached to the ordinary apparatus for winding thread upon the .shuttle bobbins of sewing-machines, for the purpose of laying the thread evenly upon the bobbin, lsaid mechanism deriving its motion from the shaft that rotates the bobbin, and therefore moving always jwith a speed bearing the same proportion to t-he velocity of the bobbin, whether that be greater or less.

In the drawings-.-

A is the frame of the bobbin-Winder, to be clamped in any convenient manner to the cloth-table of the machine.

Ais the shaft, that drives the bobbin a, said shaft bearing a pulley, a', on which runs the driving-belt. e

The shaft A projects beyond the pulley, and such projecting part, A", is threaded exteriorly, so as to form a screw, which drives the toothed wheel B, sustained on a bent arm, B', projecting from the frame A directly beneath the screw A".

A crank-pin, b, projecting from t-he side of the wheel B, carries, in a circular path, the lower end of an arm, O; the upper end of which is pivoted to the upper extremity of' a second arm, C', the lower extremity of' which is jointed to the side of the frame A, opposite the bobbin a.

The arm O receives from the arm C a. vibratory motion parallel with the axis of the bobbin, and is provided with holes, c,through either of which' the thread may pass from the spool, and thus be laid evenly ou the bobbin.

The holes c are made in aseries, lengthwise of the -arln C', so that large-sized threads, which fill thebohbin faster than those of smaller size, may be passed through the upper holes, and receive morcrapid lateral motion.

Tlle'arins O C', deriving their movement from the same shaft that drives the bobbin, must always move with a speed bearing vthe same proportion to the speed of the latter, whether that be accelerated or retarded.'

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is- I The combination of-the screw A", gear-wheel B, and arms C C', with the frame of a bobbin-Winder, the

whole constructed and arranged to operate in the man-` ner and for the purpose described.

THOMAS SHANKS.

Witnesses:

J. N. MAOKENHEIM,

RICHARD NALLY. 

